<template>
  <section>
    <header class="top_tips">
      <span class="num_tip" v-if="fatherComponent === 'home'">{{ level }}</span>
      <span class="num_tip" v-if="fatherComponent === 'item'"
        >题目{{ itemNum }}</span
      >
    </header>
    <!--Home Start-->
    <div v-if="fatherComponent === 'home'">
      <div class="home_logo item_container_style"></div>
      <router-link to="item" class="start button_style"></router-link>
    </div>
    <!--Item Question-->
    <div v-if="fatherComponent === 'item'">
      <div class="item_back item_container_style">
        <div class="item_list_container" v-if="itemDetail.length > 0">
          <header class="item_title">
            {{ itemDetail[itemNum - 1].topic_name }}
          </header>
          <ul>
            <li
              v-for="(item, index) in itemDetail[itemNum - 1].topic_answer"
              :key="item.topic_answer_id"
              @click="choosed(index, item.topic_answer_id)"
              class="item_list"
            >
              <span
                class="option_style"
                v-bind:class="{ has_choosed: choosedNum == index }"
                >{{ chooseType(index) }}</span
              >
              <span class="option_detail">{{ item.answer_name }}</span>
            </li>
          </ul>
        </div>
      </div>
      <span
        class="next_item button_style"
        @click="nextItem"
        v-if="itemNum < itemDetail.length"
      ></span>
      <span
        class="submit_item button_style"
        v-else
        @click="submitAnswer"
      ></span>
    </div>
  </section>
</template>

<script>
import { Dialog } from 'vant'
import { mapState, mapActions } from 'vuex'
export default {
  name: 'ItemContainer',
  props: {
    fatherComponent: {
      type: String,
      required: true
    }
  },
  data() {
    return {
      itemId: null, //题目ID
      choosedNum: null, //选中答案索引
      choosedId: null //选中答案id
    }
  },
  computed: {
    ...mapState([
      'itemNum', // 第几题
      'level', // 第几周
      'timer', // 定时器
      'itemDetail' // 题目内容
    ])
  },
  methods: {
    ...mapActions([
      'addNum', // 下一题
      'initializeData' // 初始化
    ]),
    chooseType(type) {
      switch (type) {
        case 0:
          return 'A'
        case 1:
          return 'B'
        case 2:
          return 'C'
        case 3:
          return 'D'
      }
    },
    choosed(type, id) {
      this.choosedNum = type
      this.choosedId = id
    },
    nextItem() {
      if (this.choosedNum !== null) {
        this.choosedNum = null
        this.addNum(this.choosedId)
      } else {
        Dialog({ message: '您还没有选择答案哦' })
      }
    },
    submitAnswer() {
      if (this.choosedNum !== null) {
        this.addNum(this.choosedId)
        if (this.timer) clearInterval(this.timer)
        this.$router.push('score')
      } else {
        Dialog({ message: '您还没有选择答案哦' })
      }
    }
  },
  created() {
    if (this.fatherComponent === 'home') {
      this.initializeData()
      document.body.style.backgroundImage = 'url(./1-1.jpg)'
    }
  }
}
</script>

<style lang="less">
.top_tips {
  position: absolute;
  height: 7.35rem;
  width: 3.25rem;
  top: -1.3rem;
  right: 1.6rem;
  background: url(../assets/WechatIMG2.png) no-repeat;
  background-size: 100% 100%;
  z-index: 10;
  .num_tip {
    position: absolute;
    left: 0.48rem;
    bottom: 1.1rem;
    height: 0.7rem;
    width: 2.5rem;
    font-size: 0.6rem;
    font-family: '黑体';
    font-weight: 600;
    color: #a57c50;
    text-align: center;
  }
}
.item_container_style {
  height: 11.625rem;
  width: 13.15rem;
  background-repeat: no-repeat;
  position: absolute;
  top: 4.1rem;
  left: 1rem;
}
.home_logo {
  background-image: url(../assets/1-2.png);
  background-size: 13.142rem 100%;
  background-position: right center;
}
.item_back {
  background-image: url(../assets/2-1.png);
  background-size: 100% 100%;
}
.button_style {
  display: block;
  height: 2.1rem;
  width: 4.35rem;
  background-size: 100% 100%;
  position: absolute;
  top: 16.5rem;
  left: 50%;
  margin-left: -2.4rem;
  background-repeat: no-repeat;
}
.start {
  background-image: url(../assets/1-4.png);
}
.next_item {
  background-image: url(../assets/2-2.png);
}
.submit_item {
  background-image: url(../assets/3-1.png);
}
.item_list_container {
  position: absolute;
  height: 7rem;
  width: 8rem;
  top: 2.4rem;
  left: 3rem;
  -webkit-font-smoothing: antialiased;
}
.item_title {
  font-size: 0.65rem;
  color: #0efe6f;
  line-height: 0.7rem;
}
.item_list {
  font-size: 0;
  margin-top: 0.4rem;
  width: 10rem;
  span {
    display: inline-block;
    font-size: 0.6rem;
    color: #fff;
    vertical-align: middle;
  }
  .option_style {
    height: 0.725rem;
    width: 0.725rem;
    border: 1px solid #fff;
    border-radius: 50%;
    line-height: 0.725rem;
    text-align: center;
    margin-right: 0.3rem;
    font-size: 0.5rem;
    font-family: 'Arial';
  }
  .has_choosed {
    background-color: #ffd400;
    color: #575757;
    border-color: #ffd400;
  }
  .option_detail {
    width: 7.5rem;
    padding-top: 0.11rem;
  }
}
</style>
